<template>
  <div>
    <!-- 评论列表 -->
    <div class="commentList">
      <van-list
        v-model="loading"
        :finished="finished"
        finished-text="没有更多了"
        @load="onLoad"
        :immediate-check="false"
        offset="20"
      >
        <div class="cmt-list" v-for="item in commentsList" :key="item.com_id">
          <!-- 评论的 Item 项 -->
          <div class="cmt-item">
            <!-- 头部区域 -->
            <div class="cmt-header">
              <!-- 头部左侧 -->
              <div class="cmt-header-left">
                <img :src="item.aut_photo" alt="" class="avatar" />
                <span class="uname">{{ item.aut_name }}</span>
              </div>
              <!-- 头部右侧 -->
              <div class="cmt-header-right">
                <van-icon
                  name="like"
                  size="0.42666666rem"
                  color="red"
                  v-if="item.is_liking"
                  @click="likeFn(true, item)"
                />
                <van-icon
                  name="like-o"
                  size="0.42666666rem"
                  color="gray"
                  v-else
                  @click="likeFn(false, item)"
                />
              </div>
            </div>
            <!-- 主体区域 -->
            <div class="cmt-body">
              {{ item.content }}
            </div>
            <!-- 尾部区域 -->
            <div class="cmt-footer">{{ toTimeAgo(item.pubdate) }}</div>
          </div>
        </div>
      </van-list>
    </div>
    <!-- 底部添加评论区域 - 1 -->
    <div class="add-cmt-box van-hairline--top" v-if="show">
      <van-icon name="arrow-left" size="18" @click="$router.back()" />
      <div class="ipt-cmt-div" @click="show = !show">发表评论</div>
      <div class="icon-box">
        <van-badge :content="totalCount" max="99">
          <van-icon
            name="comment-o"
            size="0.533333333rem"
            @click="toCommentFn"
          />
        </van-badge>
        <van-icon name="star-o" size="0.533333333rem" />
        <van-icon name="share-o" size="0.533333333rem" />
      </div>
    </div>

    <!-- 底部添加评论区域 - 2 -->
    <div class="cmt-box van-hairline--top" v-else>
      <textarea
        v-model="sendText"
        @blur="blurFn"
        v-focus
        placeholder="友善评论、理性发言、阳光心灵"
      ></textarea>
      <van-button
        @click="sendFn"
        type="default"
        :disabled="sendText.length == 0"
        >发布</van-button
      >
    </div>
  </div>
</template>

<script>
// 接口
import {
  commentsListAPI,
  commentsLikeAPI,
  commentsDisLikeAPI,
  sendCommentsAPI
} from '@/api'
// 导入时间处理函数
import { toTimeAgo } from '@/utils/date'

export default {
  props: {
    aitId: {
      type: [String, Number], // 字符串或数字均可
      required: true
    }
  },
  data () {
    return {
      commentsList: [], // 评论列表
      show: true, // 添加评论状态
      sendText: '', // 评论内容
      totalCount: '', // 评论总条数
      loading: false, // 底部加载更多状态
      finished: false, // 底部加载完成状态
      lastComId: ''
    }
  },
  methods: {
    //   注册时间处理函数
    toTimeAgo,
    // 喜欢不喜欢
    async likeFn (bool, item) {
      if (bool === true) {
        // 点击红心
        // 业务:喜欢=>不喜欢
        // 发送不喜欢请求
        item.is_liking = false
        const res = await commentsDisLikeAPI({ comId: item.com_id })
        console.log(1, res)
      } else {
        // 业务:不喜欢=>喜欢
        // 发送不喜欢请求
        item.is_liking = true
        const res2 = await commentsLikeAPI({ target: item.com_id })
        console.log(2, res2)
      }
    },
    // 失去焦点隐藏输入框
    blurFn () {
      setTimeout(() => {
        // 必须是异步的,要不失去焦点后下面函数不会触发
        this.show = !this.show
      })
    },
    // 发布评论
    async sendFn () {
      const res = await sendCommentsAPI({
        target: this.aitId,
        content: this.sendText
      })
      console.log(res.data)
      this.commentsList.unshift(res.data.data.new_obj)
      this.sendText = ''
      this.totalCount++
    },
    // 点击评论条数 页面滑动到评论列表
    toCommentFn () {
      document
        .querySelector('.like-box')
        .scrollIntoView({ behavior: 'smooth' })
    },
    // 底部加载更多
    onLoad () {
      this.lastComId = this.commentsList[this.commentsList.length - 1].com_id
      this.getCommentsList()
    },
    // 请求评论类表方法
    async getCommentsList () {
      const res = await commentsListAPI({ aitId: this.aitId, offset: this.lastComId })
      if (res.data.data.results.length === 0) {
        this.finished = true
        return
      }
      this.totalCount = res.data.data.total_count
      this.commentsList = [...this.commentsList, ...res.data.data.results]
      this.loading = false
    }
  },

  async created () {
    this.getCommentsList()
  }
}
</script>

<style scoped lang="less">
// 评论列表
.cmt-list {
  padding: 10px;
  .cmt-item {
    padding: 15px 0;
    + .cmt-item {
      border-top: 1px solid #f8f8f8;
    }
    .cmt-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      .cmt-header-left {
        display: flex;
        align-items: center;
        .avatar {
          width: 40px;
          height: 40px;
          background-color: #f8f8f8;
          border-radius: 50%;
          margin-right: 15px;
        }
        .uname {
          font-size: 12px;
        }
      }
    }
    .cmt-body {
      font-size: 14px;
      line-height: 28px;
      text-indent: 2em;
      margin-top: 6px;
      word-break: break-all;
    }
    .cmt-footer {
      font-size: 12px;
      color: gray;
      margin-top: 10px;
    }
  }
}
/*美化 - 文章详情 - 底部的评论页面 */
// 外层容器
.art-cmt-container-1 {
  padding-bottom: 46px;
}
.art-cmt-container-2 {
  padding-bottom: 80px;
}

// 发布评论的盒子 - 1
.add-cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  box-sizing: border-box;
  background-color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 46px;
  line-height: 46px;
  padding-left: 10px;
  .ipt-cmt-div {
    flex: 1;
    border: 1px solid #efefef;
    border-radius: 15px;
    height: 30px;
    font-size: 12px;
    line-height: 30px;
    padding-left: 15px;
    margin-left: 10px;
    background-color: #f8f8f8;
  }
  .icon-box {
    width: 40%;
    display: flex;
    justify-content: space-evenly;
    line-height: 0;
  }
}

.child {
  width: 20px;
  height: 20px;
  background: #f2f3f5;
}

// 发布评论的盒子 - 2
.cmt-box {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  padding-left: 10px;
  box-sizing: border-box;
  background-color: white;
  textarea {
    flex: 1;
    height: 66%;
    border: 1px solid #efefef;
    background-color: #f8f8f8;
    resize: none;
    border-radius: 6px;
    padding: 5px;
  }
  .van-button {
    height: 100%;
    border: none;
  }
}
.commentList{
    margin-bottom: 45px;
}
</style>
